I may have experienced this. A couple years ago I was getting over a cold. I blew my nose and instantly experienced severe vertigo. The room looked like it was spinning and it felt like I was on a boat in the middle of a rough storm. I nearly fell over. It took about 15 minutes for the sensation to fully expire.
I’m really annoyed how little consistency there is in sizing terminology. One brand’s ‘XL’ might be too tight for me while another brand’s ‘XL’ could fit me like a garbage bag. Makes shopping online a real hassle for me. I always have to check measurement tables and even then it still might not fit right.
I don’t understand why the inconsistency exists. If brands all agreed with each other on what exactly their sizing terms mean, wouldn’t that cut down on returns?